30 results about "CTD" patented technology

A MEMS-based silicon CTD sensor for ocean environment is presented. The sensor components are a capacitive conductivity sensor, a gold doped silicon temperature sensor, and a multiple diapghram piezoresistive pressure sensor. The sensor elements have further been packaged to protect them from harsh marine menvironment. The sensor components showed good linear response, resolution and mechanical integrity to the harsh ocean environment.

The invention discloses a self-balancing descending type seabed base, which is characterized by comprising a seabed base and a recovery instrument floating body, wherein the seabed base comprises a base body and a plurality of layers of guide plates, the guide plates are annularly distributed on the base body at intervals, and the guide plates are connected and fixed on the base body through reinforcing ribs; a cylindrical cavity with an upward opening is formed in the upper middle portion of the seabed base, the recovery instrument floating body is installed on the cylindrical cavity formed in the upper portion of the seabed base, and a closed cabin is formed between the recovery instrument floating body and the cylindrical cavity of the seabed base. Three ocean observation instruments including ADCP, CTD and a releaser are arranged in the instrument recovery bin. Water changing holes are designed on two sides of the instrument recovery bin, and a rope disc is arranged on the lower portion. The self-balancing descending type seabed base has the functions of net disengaging prevention, silting prevention, biological attachment prevention and self-balancing vertical descending landing, the laying steps are simplified, the observation success rate is increased, and the self-balancing descending type seabed base can be used for ocean element observation of sea areas such as bays,estuary, continental shelving and continental slopes.

The invention provides a device for monitoring seabed shallow sediment erosion resuspension in an internal wave environment. The device comprises a snorkeling system, an observation platform and a supporting system, the snorkeling system comprises a glass floating ball combination, a mooring rope, a subsurface buoy, a Kelvar cable and a limiting cylinder. The observation platform comprises a middle supporting rod, a stabilizing circular ring, a supporting rod, an acoustic Doppler current profiler, a sediment capturer, a circular ring with a hole, an optical backscattering turbidity meter, a battery bin, a conductivity-temperature-depth meter, a supporting plate and an acoustic Doppler velocimetry. The supporting system comprises a buffering device, a vertical supporting rod and a gravity anchor. According to the technical scheme of the invention; the device aims to directly reach the seabed to collect and obtain accurate suspended sediment concentration information on the basis of notdestroying the seabed environment. The influence of the seabed on the internal solitary wave suspended sediments is discussed; and the device is good for evaluating the suspension quantity caused by internal solitary waves and the influence on the seabed deposition process, is good for further predicting the seabed evolution, is good for accurately describing the sediment movement and improving the sediment resuspension quantity prediction level in application, and also provides a new technology and means for sediment resuspension research.

The invention discloses an oceanic turbulence mixed observation method. The method comprises the following steps: (1) laying an oceanic turbulence observation system; (2) starting an ocean turbulenceobservation system, performing state detection and positioning by a ground data center, and setting an observation task; (3) enabling the oceanic turbulence observation system to dive and perform sawtooth diving, horizontal sailing and sawtooth floating motion; (4) in the underwater movement process of the oceanic turbulence observation system, observing turbulence mixed distribution characteristics at different depths by a turbulence observer, and synchronously acquiring CTD data and flow velocity data through a CTD sensor and a flow velocity sensor; and (5) after the observation is finished,floating upwards, and transmitting the acquired data to a ground data center. According to the ocean turbulence mixed observation method, horizontal observation and vertical profile observation of turbulence mixing can be synchronously carried out, and space and time multi-dimensional synchronous observation of ocean turbulence mixing in the transverse direction and the longitudinal direction isachieved; and autonomous intelligent observation of turbulence mixing under different ocean phenomena can be realized.

The invention relates to the technical field of fixed-point ocean observation, and particularly relates to a floating seabed base which comprises a seabed base box body and a gravity anchor. The seabed base box body is connected with the gravity anchor through a release cable, a release device is installed on a partition plate arranged in the seabed base box body, and the partition plate divides the seabed base box body into an upper box body and a lower box body. The upper box body is provided with an underwater acoustic communication machine, an ADCP, a CTD, an optional observation instrument and a floating ball; and the lower box body is provided with a cable winding device with a friction disc. In a releasing process, when the partition plate is located on an interface of the soft sediment layer and seawater, a torque generated by a release cable is larger than the maximum static friction torque of the friction disc of the cable winding device, a cable winding roller rotates, the release cable is lengthened, the seabed base box body is prevented from continuously sinking, and the releasing point soft sediment layer thickness is adapted. Technical problems that the seabed base release cable is too short, the seabed base may be buried in the soft sediment layer to be lost, and the seabed base release cable is too long and may be dragged away by a fishing net to be lost are solved, and an instrument loss rate and unit observation data cost are greatly reduced.

The invention aims at the requirements of integrated monitoring application of seawater temperature salinity and depth, overcomes the defects of various existing temperature, salinity and depth sensors, and provides a CTD sensing array based on a micro-nano optical fiber coupler SAGNAC ring. The CTD sensing array is composed of a tunable wavelength scanning light source, a tunable optical switch,n optical circulators, n-1 CTD sensors based on the micro-nano optical fiber coupler SAGNAC ring, an FBG temperature sensor, a beam combiner, a photoelectric detector, a data acquisition card, a signal processing computer and a CT electrical sensor. Multi-sensing-probe space division multiplexing cascading is achieved through the tunable optical switch, then temperature, salinity and depth integrated signal demodulation processing is achieved through the high-precision tunable light source and the array has the characteristics of being compact in structure, high in modular integration degree,high in data compatibility, low in cost, high in sensitivity and the like.

The invention discloses a monitoring and adjusting system for a seat bottom self-elevating underwater leveling frame. The system comprises four underwater pressure sensors, a positioning GPS, a data sending unit, a temperature-salinity-depth instrument and a data processing and displaying module, the four underwater pressure sensors are close to the four hydraulic supporting legs respectively andinstalled on a rectangular frame of the leveling frame, the positioning GPS and the data sending unit are exposed out of the water surface and installed on the measuring tower, the measuring tower isfixed to the rectangular frame of the leveling frame, and the temperature-salinity-depth instrument is installed on a hopper or a trolley of the leveling frame. The data processing and displaying module comprises a computer, a data receiving unit and a data processing unit, and the data processing unit obtains the telescopic amount of the four hydraulic supporting legs through calculation. According to the leveling device, the telescopic amount of the four hydraulic supporting legs of the leveling frame can be obtained, the telescopic amount is sent to the hydraulic control system, and then height adjustment of the hydraulic supporting legs can be achieved.

The invention relates to a sea water temperature and salt calibration data acquisition device, which comprises a thermostatic bath, a standard temperature sensor and a standard conductivity sensor, wherein a simulated sea water environment is in the thermostatic bath, a support frame is arranged in the thermostatic bath, and two or more detected CTDs are fixed on the support frame; the standard temperature sensor and the standard conductivity sensor are connected through a watertight cable and can be lowered to the position, close to a detected CTD, in the thermostatic bath, and the standard temperature sensor, the standard conductivity sensor and the detected CTD are located at the same depth. Real-time measurement of temperature and conductivity in the thermostatic bath can be realized,standard temperature and standard conductivity values are provided for experimenters, and abnormal conductivity in the experiment process can be found out at the same time. The conductivity standard value can be obtained in real time, a sea water sample does not need to be collected in an experiment, the conductivity measurement error of the detected CTD can be found in time, and the experiment process is optimized.

The invention relates to a sea water temperature and salinity information time sequence prediction method based on shipborne CTD measurement data. The method comprises the following steps: collectingsea water temperature and conductivity data, and calculating salinity measurement data based on the measured conductivity information so as to obtain original temperature and salinity data; preprocessing original temperature and salinity data collected by a shipborne CTD, wherein the preprocessing process comprises interpolation, filtering and screening so as to obtain time sequence information conforming to a calculation standard; dividing the preprocessed data into time information and attribute information including temperature and salinity, and performing fuzzy rule division on the time information; acquiring a new membership function after threshold segmentation, performing sequence alignment on attribute information and time information after fuzzy segmentation to establish a new time sequence data set, and constructing the new membership data set by using the part of sequence information as a new fuzzy sequence number; designing a long-term and short-term memory neural network prediction model, setting a loss function, and training and establishing the prediction model by using the training set.

The invention belongs to the technical field of ocean observation, and relates to a disposable underwater temperature-salinity-depth measuring device carried on an underwater vehicle. The invention discloses a disposable underwater temperature-salinity-depth measuring device carried on an underwater vehicle. The disposable underwater temperature-salinity-depth measuring device comprises a split shell, a front-end floater, a rear-end floater, a CTD sensor and a control panel, the lower portion of the front-end floater is connected with a bottom end cover, a split shell is arranged outside the rear-end floater, and the split shell is connected with the bottom end cover in a matched mode through a connecting mechanism. The CTD sensor is in watertight connection with the top of the front-end floater; a pressure triggering mechanism is arranged in the front-end floater; the pressure triggering structure comprises a screw rod seat, a movable screw rod and a cam screw rod; the screw seat is hermetically connected with the bottom end cover, and the bottom end cover is hermetically connected with the front-end floater in sequence to form a watertight space; the control panel is installed in the watertight space. The device is launched through an underwater vehicle, temperature-salinity-depth measurement of a water body profile is completed in the floating process, and measurement data is transmitted to the underwater vehicle; and disassembling and discarding after measurement is completed.

The invention discloses a turbulence signal data processing system and method for an ocean microstructure profiler. The system comprises a first branch, a second branch, a third branch, and a fourth branch, which are respectively used for receiving turbulence transverse data, turbulence longitudinal data, turbulence temperature change data, and turbulence CTD data. The data collected by the turbulence signal data processing system can meet the requirement for ocean turbulence research and analysis, turbulence transverse data, turbulence longitudinal data, turbulence temperature change data and turbulence CTD data are collected by using different branches respectively, interference caused by using the same channel to collect the data can be avoided, and the detection precision is improved. Compared with like systems and methods in the prior art, the system and the method can better cope with adverse factors such as complex environment temperature change, high humidity and high noise for turbulent motion measurement, and has better signal-to-noise ratio performance, smaller size and lower power consumption. The method and the system are widely applied to the technical field of electronic circuits.

The invention discloses a vertical channel navigation method of a deep sea type underwater vehicle. The method comprises the following steps: constructing a pressure intensity-depth database by using a CTD profile, inputting the pressure intensity measured by IPS of the underwater vehicle into a database for linear interpolation to obtain the IPS interpolation depth, the IPS measurement being inevitably influenced by sea waves and sensor noise; and then outputting a smoother depth based on an AKF filter. The influence of sea waves and sensor noise is weakened, and the method can be applied to a deep sea environment and is not influenced by the seawater depth. According to the scheme, temperature, salinity and pressure profiles measured by CTD are used, a seawater state equation is combined, the conversion error from pressure to depth is smaller, error accumulation does not exist, the updating frequency of navigation result output smooth data is high, navigation is carried out based on smoothed vertical speed information, and better practical application and popularization effects are achieved.

The invention belongs to the field of deep-sea detection and trace element collection, and particularly relates to a deep-sea trace element automatic bottle opening clean water sampler device. A water sampling bottle fixing frame is mounted on a water sampler base, and a balance base detachably mounted on the water sampler base is arranged below the water sampling bottle fixing frame; a clamping groove is formed in a water sampling bottle fixing frame through a clamping groove fixing plate, a water sampler hanging plate is detachably connected to the clamping groove, a plurality of CTD water sampling bottles are evenly arranged on the periphery of the clamping groove in the circumferential direction, each CTD water sampling bottle is hung on the water sampling bottle fixing frame, a hydraulic cylinder is installed on a bottle body of each CTD water sampling bottle, and the output end of the hydraulic cylinder is connected with a bottle cap of the CTD water sampling bottle through a traction spring. The device can collect deep-sea clean seawater, prevents the collected deep-sea seawater from being contaminated by other elements in the collection process, is convenient to install, simple to operate and high in working efficiency, and has important significance on deep-sea trace element collection and related research in China.

The invention relates to the technical field of seawater measurement, and provides a temperature-salinity-depth instrument and a matching device with the temperature-salinity-depth instrument and a carrying platform. The temperature-salinity-depth instrument comprises a deceleration assembly which comprises a deceleration cabin body; the circuit assembly comprises a circuit cabin body; the floating assembly comprises a rack, and the circuit cabin body is connected with one end of the rack; the measuring probe comprises a probe body and at least one first unlocking assembly, is arranged between the deceleration cabin body and the circuit cabin body, and is used for automatically separating the deceleration cabin body from the circuit cabin body after the temperature-salinity-depth instrument enters a detection water area; and/or at least one second unlocking assembly which is arranged between the rack and the probe body and is used for automatically separating the probe body from the rack after the temperature-salinity-depth instrument enters a detection water area and automatically separating the deceleration cabin body from the circuit cabin body and the probe body from the rack after the temperature-salinity-depth instrument falls towards the detection water area and enters the detection water area. And the separation between the two connecting bodies can be realized without the operation of a worker.

The invention discloses an underwater anti-rotation empennage which comprises an anti-rotation piece for preventing underwater rotation of a direct-reading type CTD in the circumferential direction, and the anti-rotation piece is connected to a water sampling frame of the direct-reading type CTD. Preferably, the anti-rotation piece comprises a supporting framework and high-strength waterproof cloth, and the high-strength waterproof cloth is arranged on the supporting framework. Preferably, the supporting framework comprises a pressure-resistant buoyancy rod and a stainless steel framework, and the pressure-resistant buoyancy rod is arranged on the upper portion of the stainless steel framework. Preferably, the water sampling device further comprises a storage support used for storing the high-strength waterproof cloth, the storage support is fixedly connected to the water sampling frame, and the pressure-resistant buoyancy rod and the stainless steel framework are rotationally connected to the storage support. The invention further discloses the direct-reading type CTD. According to the underwater anti-rotation empennage and the direct-reading CTD with the same, automatic unfolding under water and automatic folding after water outgoing can be achieved, steel cable damage caused by underwater rotation of the empennage is prevented, and safety of marine instruments and equipment is guaranteed.

The invention belongs to the field of marine science investigation, and particularly relates to a conversion cable for connecting a wet plugging interface temperature-salinity-depth instrument and a standard interface transmission cable. A wet plugging female interface and a standard male interface are respectively connected to two ends of the cable through a rubber vulcanization method, the wet plugging female interface is provided with two wire holes, the standard male interface is provided with a thin wire pin and a thick wire pin, the cable comprises two mutually insulated wires, and eachwire hole is in conduction connection with one wire pin through one wire; positioning devices are correspondingly arranged on the wet plugging female interface and the wet plugging male interface of the SBE type temperature-salinity-depth instrument of the wet plugging interface connected with the wet plugging female interface; and the wet plugging female interface is sleeved with a wet plugging interface fixing cover, and the standard male interface is sleeved with a standard interface fixing cover. According to the invention, the original transmission cable does not need to be damaged, the wet plugging transmission interface of the temperature-salinity-depth instrument can be rapidly changed into a standard transmission interface of the temperature-salinity-depth instrument, marine scientific investigation is facilitated, and the industrialization prospect is wide.